Behaviour of 2,9-disubstituted 1, 10-phenanthroline derivatives as specific lithium ion fluorophores

摘要: 1, 10-Phenanthroline derivatives having butyl groups at positions 2 and 9 were found to exhibit a marked increase in fluorescence intensity organic solvents such as acetonitrile 1,4-dioxane the presence of lithium perchlorate, but not sodium, potassium beryllium ions. The depends largely on nature substituents 9; enhancement is relatively small for 2, 9-dimethyl virtually negligible 2,9-di-tert-butyle derivatives. In contrast, 4 7 has very little effect intensity. concentration ions significant spectrum; varies markedly with ion range from 1 × 10–6 10–4 mol dm–3. It suggested that these phenanthroline might be applied selective spectrofluorimetric detection was also investigated. increased markedly.